Turbidity sensor

Optics: measuring and testing – For light transmission or absorption – Of fluent material

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Details

350 70, G01N 2105

Patent

active

058284583

ABSTRACT:
A fluid turbidity or filter clog sensor comprises a light source and a detector having at least one sensor position to cross a flow path or a filter element in order to improve the correspondence of the light intensity received at the receiver in correspondence with the turbidity level or clogging level occurring in the test cell. The detector preferably includes a direct path sensor, a scattered path sensor positioned to cross the flow path from the transmitter, and the reference light sensor communicating with the source outside of the test chamber. Moreover, the direct path may be a straight line path or a reflected path through the flow path when a fluid having a low level of turbidity is passed through the test cell. Likewise, the sensor includes means for compensating for changes in the illuminating source, changes for temperature variations occurring at the test cell, and compact packaging for convenient installation and improved production capacity.

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